pollyfill seems to alter jQuery on MSIE11

### Description
Seeing some JS behaviour changes due to inclusion of web components

(this is the 2nd such thing - this one is easier to see...)

#### Live Demo
https://archive.org/~tracey/test/pollyfail2.htm

#### Steps to Reproduce
1. include jQuery
2. include webcomponents-bundle.js
3. create HTML w/ clickable element, eg: `a`
4. `$('a').click() ..`

#### Expected Results
On page/DOM load, should show 'clicked'

#### Actual Results
The page doesn't show 'clicked' (until link is manually clicked)

### Browsers Affected
- [ ] Chrome
- [ ] Firefox
- [ ] Edge
- [ ] Safari
- [x] IE 11